当数保存时判断DataTalbe求数据之和条件

 //保存时候判断不同类别的百分比必须100

　　　

  private string CheckOrderData(DataTable dtTable)
        {
            string strMessage = "";
            double sumPercentage = 0;
            string strTypeValue = "";
            //检查Content的Percentage是否都为100
            for (int i = 0; i < dtTable.Rows.Count; i++)
            {
                if (dtTable.Rows[i]["TypeEnglish"].ToString() != strTypeValue && i > 0) //进行类别是否相同
                {
                    if (sumPercentage != 100)
                    {
                        strMessage = "同一类别的百分比不能小于或大于100";
                    }
                    else
                    {
                        sumPercentage = 0;
                    }
                }
                sumPercentage += double.Parse(dtTable.Rows[i]["Percentage"].ToString().Trim() == "" ? "0" : dtTable.Rows[i]["Percentage"].ToString());
                strTypeValue = dtTable.Rows[i]["TypeEnglish"].ToString(); //赋值给新的
            }
            if (strMessage == "")
            {
                if (sumPercentage != 100 && dtTable.Rows.Count > 0)
                {
                    strMessage = "同一类别的百分比不能小于或大于100";
                }
            }
          
            return strMessage;
        }